FORTUNE -- In June I wrote that Sun Capital Partners had agreed to acquire Goldmax USA, a Chicago-based operator of over 200 retail locations for selling gold and other precious metals. There was an FTC filing and everything.

But sources familiar with the situation tell me that Sun has since called off the deal. Unfortunately, those same sources declined to explain why. And neither Sun nor GoldMax are talking.

Did Sun find something it didn't like at the very end of due diligence? Did the financing not come through? Door number three?

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